src/mesa/drivers/dri/i965/brw_shader.h

   1 /*
   2  * Copyright © 2010 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #include <stdint.h>
  25 #include "brw_reg.h"
  26 #include "brw_defines.h"
  27 #include "main/compiler.h"
  28 #include "glsl/ir.h"
  29
  30 #pragma once
  31
  32 enum PACKED register_file {
  33    BAD_FILE,
  34    GRF,
  35    MRF,
  36    IMM,
  37    HW_REG, /* a struct brw_reg */
  38    ATTR,
  39    UNIFORM, /* prog_data->params[reg] */
  40 };
  41
  42 struct backend_reg
  43 {
  44 #ifdef __cplusplus
  45    bool is_zero() const;
  46    bool is_one() const;
  47    bool is_null() const;
  48    bool is_accumulator() const;
  49 #endif
  50
  51    enum register_file file; /**< Register file: GRF, MRF, IMM. */
  52    enum brw_reg_type type;  /**< Register type: BRW_REGISTER_TYPE_* */
  53
  54    /**
  55     * Register number.
  56     *
  57     * For GRF, it's a virtual register number until register allocation.
  58     *
  59     * For MRF, it's the hardware register.
  60     */
  61    uint16_t reg;
  62
  63    /**
  64     * Offset within the virtual register.
  65     *
  66     * In the scalar backend, this is in units of a float per pixel for pre-
  67     * register allocation registers (i.e., one register in SIMD8 mode and two
  68     * registers in SIMD16 mode).
  69     *
  70     * For uniforms, this is in units of 1 float.
  71     */
  72    int reg_offset;
  73
  74    struct brw_reg fixed_hw_reg;
  75
  76    bool negate;
  77    bool abs;
  78 };
  79
  80 struct cfg_t;
  81 struct bblock_t;
  82
  83 #ifdef __cplusplus
  84 struct backend_instruction : public exec_node {
  85    bool is_tex() const;
  86    bool is_math() const;
  87    bool is_control_flow() const;
  88    bool can_do_source_mods() const;
  89    bool can_do_saturate() const;
  90    bool can_do_cmod() const;
  91    bool reads_accumulator_implicitly() const;
  92    bool writes_accumulator_implicitly(struct brw_context *brw) const;
  93
  94    void remove(bblock_t *block);
  95    void insert_after(bblock_t *block, backend_instruction *inst);
  96    void insert_before(bblock_t *block, backend_instruction *inst);
  97    void insert_before(bblock_t *block, exec_list *list);
  98
  99    /**
 100     * True if the instruction has side effects other than writing to
 101     * its destination registers.  You are expected not to reorder or
 102     * optimize these out unless you know what you are doing.
 103     */
 104    bool has_side_effects() const;
 105 #else
 106 struct backend_instruction {
 107    struct exec_node link;
 108 #endif
 109    /** @{
 110     * Annotation for the generated IR.  One of the two can be set.
 111     */
 112    const void *ir;
 113    const char *annotation;
 114    /** @} */
 115
 116    uint32_t offset; /**< spill/unspill offset or texture offset bitfield */
 117    uint8_t mlen; /**< SEND message length */
 118    int8_t base_mrf; /**< First MRF in the SEND message, if mlen is nonzero. */
 119    uint8_t target; /**< MRT target. */
 120
 121    enum opcode opcode; /* BRW_OPCODE_* or FS_OPCODE_* */
 122    enum brw_conditional_mod conditional_mod; /**< BRW_CONDITIONAL_* */
 123    enum brw_predicate predicate;
 124    bool predicate_inverse:1;
 125    bool writes_accumulator:1; /**< instruction implicitly writes accumulator */
 126    bool force_writemask_all:1;
 127    bool no_dd_clear:1;
 128    bool no_dd_check:1;
 129    bool saturate:1;
 130    bool shadow_compare:1;
 131    bool header_present:1;
 132 };
 133
 134 #ifdef __cplusplus
 135
 136 enum instruction_scheduler_mode {
 137    SCHEDULE_PRE,
 138    SCHEDULE_PRE_NON_LIFO,
 139    SCHEDULE_PRE_LIFO,
 140    SCHEDULE_POST,
 141 };
 142
 143 class backend_visitor : public ir_visitor {
 144 protected:
 145
 146    backend_visitor(struct brw_context *brw,
 147                    struct gl_shader_program *shader_prog,
 148                    struct gl_program *prog,
 149                    struct brw_stage_prog_data *stage_prog_data,
 150                    gl_shader_stage stage);
 151
 152 public:
 153
 154    struct brw_context * const brw;
 155    struct gl_context * const ctx;
 156    struct brw_shader * const shader;
 157    struct gl_shader_program * const shader_prog;
 158    struct gl_program * const prog;
 159    struct brw_stage_prog_data * const stage_prog_data;
 160
 161    /** ralloc context for temporary data used during compile */
 162    void *mem_ctx;
 163
 164    /**
 165     * List of either fs_inst or vec4_instruction (inheriting from
 166     * backend_instruction)
 167     */
 168    exec_list instructions;
 169
 170    cfg_t *cfg;
 171
 172    gl_shader_stage stage;
 173
 174    virtual void dump_instruction(backend_instruction *inst) = 0;
 175    virtual void dump_instruction(backend_instruction *inst, FILE *file) = 0;
 176    virtual void dump_instructions();
 177    virtual void dump_instructions(const char *name);
 178
 179    void calculate_cfg();
 180    void invalidate_cfg();
 181
 182    void assign_common_binding_table_offsets(uint32_t next_binding_table_offset);
 183
 184    virtual void invalidate_live_intervals() = 0;
 185 };
 186
 187 uint32_t brw_texture_offset(struct gl_context *ctx, int *offsets,
 188                             unsigned num_components);
 189
 190 #endif /* __cplusplus */
 191
 192 enum brw_reg_type brw_type_for_base_type(const struct glsl_type *type);
 193 enum brw_conditional_mod brw_conditional_for_comparison(unsigned int op);
 194 uint32_t brw_math_function(enum opcode op);
 195 const char *brw_instruction_name(enum opcode op);
 196 bool brw_saturate_immediate(enum brw_reg_type type, struct brw_reg *reg);
 197
 198 #ifdef __cplusplus
 199 extern "C" {
 200 #endif
 201
 202 bool brw_vs_precompile(struct gl_context *ctx,
 203                        struct gl_shader_program *shader_prog,
 204                        struct gl_program *prog);
 205 bool brw_gs_precompile(struct gl_context *ctx,
 206                        struct gl_shader_program *shader_prog,
 207                        struct gl_program *prog);
 208 bool brw_fs_precompile(struct gl_context *ctx,
 209                        struct gl_shader_program *shader_prog,
 210                        struct gl_program *prog);
 211
 212 #ifdef __cplusplus
 213 }
 214 #endif